#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPLrXI1IhAY"
#define BLYNK_TEMPLATE_NAME "Sensor pendeteksi banjir"
#define BLYNK_AUTH_TOKEN "MvHLk_0GYlFQdGU1FZJWcxDlCZcR6pc1"
#define ECHO_PIN 15
#define TRIG_PIN 4
#define vibrator 5
#define buzzer 18
int indikator = 27;

#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

LiquidCrystal_I2C lcd(0x27, 20, 4);
Servo myservo; 
BlynkTimer timer;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(vibrator, OUTPUT);
  pinMode(indikator, OUTPUT);
  lcd.init();
  lcd.backlight();
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, sendSensor);
  myservo.attach(2);
  myservo.write(0);
}

void loop() {  
  sendSensor();
  Blynk.run();
  timer.run();
}

void sendSensor()
{
  digitalWrite (indikator, HIGH);
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  if (distance >= 0 && distance < 30){
    int cm = int(distance);
    lcd.setCursor(0, 0);
    lcd.print("Ketinggian ");
    lcd.print(cm);
    lcd.print(" CM");
    lcd.setCursor(0, 1);
    lcd.print("Normal");
    Blynk.virtualWrite(V1, "");
    Blynk.virtualWrite(V0, "Kondisi Normal");
  }
  if (distance > 30 && distance < 50){
    int cm = int(distance);
    lcd.setCursor(0, 0);
    lcd.print("Ketinggian ");
    lcd.print(cm);
    lcd.print(" CM");
    lcd.setCursor(0, 1);
    lcd.print("Siaga 3");
    Blynk.virtualWrite(V0, "Siaga 3");
    Blynk.virtualWrite(V1, cm);
    myservo.write(30);
  }
  if (distance > 50 && distance < 100){
    digitalWrite(vibrator, HIGH);
    int cm = int(distance);
    lcd.setCursor(0, 0);
    lcd.print("Ketinggian ");
    lcd.print(cm);
    lcd.print(" CM");
    lcd.setCursor(0, 1);
    lcd.print("Siaga 2");
    Blynk.virtualWrite(V0, "Siaga 2");
    Blynk.virtualWrite(V1, cm);
    digitalWrite(vibrator, HIGH);
    myservo.write(60);
    tone (buzzer, 150);
    delay(500);
    noTone(buzzer);
  }
  if (distance > 100){
    digitalWrite(vibrator, HIGH);
    int cm = int(distance);
    lcd.setCursor(0, 0);
    lcd.print("Ketinggian ");
    lcd.print(cm);
    lcd.print(" CM");
    lcd.setCursor(0, 1);
    lcd.print("Siaga 1");
    Blynk.virtualWrite(V0, "Siaga 1");
    Blynk.virtualWrite(V1, cm);
    digitalWrite(vibrator, HIGH);
    myservo.write(90);
    tone (buzzer, 200);
    delay(300);
    noTone(buzzer);
  }  
  delay(100);  
}